//#include "libssh2_config.h"
#include <libssh2.h>
 
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/select.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/time.h>
#include <sys/types.h>
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <ctype.h>
#include <iostream>
#include <string>
#include "sshclient.h"
 
static int waitsocket(int socket_fd, LIBSSH2_SESSION *session)
{
    struct timeval timeout;
    int rc;
    fd_set fd;
    fd_set *writefd = NULL;
    fd_set *readfd = NULL;
    int dir;
 
    timeout.tv_sec = 10;
    timeout.tv_usec = 0;
 
    FD_ZERO(&fd);
 
    FD_SET(socket_fd, &fd);
 
    /* now make sure we wait in the correct direction */ 
    dir = libssh2_session_block_directions(session);

 
    if(dir & LIBSSH2_SESSION_BLOCK_INBOUND)
        readfd = &fd;
 
    if(dir & LIBSSH2_SESSION_BLOCK_OUTBOUND)
        writefd = &fd;
 
    rc = select(socket_fd + 1, readfd, writefd, NULL, &timeout);
 
    return rc;
}


		ssh2client::ssh2client(std::string const& ip)
		{
    const char *username    = "root";
    const char *password    = "root";
    size_t len;
    LIBSSH2_KNOWNHOSTS *nh;
    int type;
 
 
    rc = libssh2_init (0);

    if (rc != 0) {
        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
    }
 
    hostaddr = inet_addr(ip.c_str());
 
    sock = socket(AF_INET, SOCK_STREAM, 0);
 
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
    if (connect(sock, (struct sockaddr*)(&sin),
                sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
    }
 
    session = libssh2_session_init();

 
    libssh2_session_set_blocking(session, 0);

 
    while ((rc = libssh2_session_handshake(session, sock)) == LIBSSH2_ERROR_EAGAIN);
    if (rc) {
        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
    }
 
    nh = libssh2_knownhost_init(session);

    if(!nh) 
	{
    }
 
 
    fingerprint = libssh2_session_hostkey(session, &len, &type);

    libssh2_knownhost_free(nh);
 
    if ( strlen(password) != 0 ) {
        while ((rc = libssh2_userauth_password(session, username, password)) ==
               LIBSSH2_ERROR_EAGAIN);
        if (rc) {
            fprintf(stderr, "Authentication by password failed.\n");
        }
    }
 
    while( (channel = libssh2_channel_open_session(session)) == NULL &&
           libssh2_session_last_error(session,NULL,NULL,0) ==
           LIBSSH2_ERROR_EAGAIN )
    {
        waitsocket(sock, session);
    }

    if( channel == NULL )
    {
        fprintf(stderr,"Error\n");
//        exit( 1 );
    }
 
		}
	
		std::string ssh2client::command(std::string const& command)
		{
    while( (rc = libssh2_channel_exec(channel, command.c_str())) == LIBSSH2_ERROR_EAGAIN )
    {
        waitsocket(sock, session);
    }
    if( rc != 0 )
    {
        fprintf(stderr,"Error\n");
//        exit( 1 );
    }
    for( ;; )
    {
        /* loop until we block */ 
        int rc;
        do
        {
            char buffer[0x4000];
            rc = libssh2_channel_read( channel, buffer, sizeof(buffer) );

            if( rc > 0 )
            {
                int i;
                bytecount += rc;
                fprintf(stderr, "We read:\n");
                for( i=0; i < rc; ++i )
                    fputc( buffer[i], stderr);
                fprintf(stderr, "\n");
            }
            else {
                if( rc != LIBSSH2_ERROR_EAGAIN )
                    /* no need to output this for the EAGAIN case */ 
                    fprintf(stderr, "libssh2_channel_read returned %d\n", rc);
            }
        }
        while( rc > 0 );
 
        /* this is due to blocking that would occur otherwise so we loop on
           this condition */ 
        if( rc == LIBSSH2_ERROR_EAGAIN )
        {
            waitsocket(sock, session);
        }
        else
            break;
    }
    exitcode = 127;
    while( (rc = libssh2_channel_close(channel)) == LIBSSH2_ERROR_EAGAIN )

        waitsocket(sock, session);
 
    if( rc == 0 )
    {
        exitcode = libssh2_channel_get_exit_status( channel );
        libssh2_channel_get_exit_signal(channel, &exitsignal, NULL, NULL, NULL, NULL, NULL);
    }
 
    if (exitsignal)
        fprintf(stderr, "\nGot signal: %s\n", exitsignal);
    else
        fprintf(stderr, "\nEXIT: %d bytecount: %d\n", exitcode, bytecount);
 
    libssh2_channel_free(channel);

    channel = NULL;
 
    libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");

    libssh2_session_free(session);
    fprintf(stderr, "all done\n");
    libssh2_exit();


			return "";
		}



void* sshQueueThread(void *ptr)
{
        sshQueue* base = (sshQueue*)ptr;

	while(true)
	{
		sshQueue::Job job = base->get();

		std::cout << "Running command " << job.command << " on pc ip " << job.ip << std::endl; 
		ssh2client client(job.ip);
		client.command(job.command);

		
	}

        return NULL;
}

       sshQueue::sshQueue()
        {
               pthread_create(&(m_sshProcess), NULL, &sshQueueThread, (void*)this);
        }

